LOS ANGELES (AP) — A Los Angeles Police Department commanding officer has been removed amid an internal investigation into a videotaped beating in which officers tackled a handcuffed registered nurse to the ground, police Chief Charlie Beck said Wednesday.Beck said previously that he had "serious concerns" about the use of force against Michelle Jordan, 34, who was arrested in the Tujunga area on Aug. 21 after being stopped for talking on a cellphone while driving, police said.Jordan got out of the car and cursed the two officers who stopped her, witnesses and Jordan's husband told KNBC-TV.